645334351213113 has 12 divisors (see below), whose sum is σ = 932325197621220. Its totient is φ = 430141864253856.

The previous prime is 645334351213039. The next prime is 645334351213121. The reversal of 645334351213113 is 311312153433546.

645334351213113 is a `hidden beast` number, since 6 + 4 + 5 + 3 + 3 + 4 + 3 + 512 + 13 + 113 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 85273349203449 + 560061002009664 = 9234357^2 + 23665608^2 .

It is not a de Polignac number, because 645334351213113 - 2¹² = 645334351209017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645334351213163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6752995806 + ... + 6753091367.

It is an arithmetic number, because the mean of its divisors is an integer number (77693766468435).

Almost surely, 2^{645334351213113} is an apocalyptic number.

It is an amenable number.

645334351213113 is a deficient number, since it is larger than the sum of its proper divisors (286990846408107).

645334351213113 is a wasteful number, since it uses less digits than its factorization.

645334351213113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13506092488 (or 13506092485 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The spelling of 645334351213113 in words is "six hundred forty-five trillion, three hundred thirty-four billion, three hundred fifty-one million, two hundred thirteen thousand, one hundred thirteen".